<!-- 
    1.要求：将数组['red','green','blue','pink','purple']内容反过来存放
    输出['purple','pink','blue','green','red']
 -->
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    <title>Document</title>
    <script>
        var arr = ['red', 'green', 'blue', 'pink', 'purple'];
        var newArr = [];
        for (var i = arr.length - 1; i >= 0; i--) {
            newArr[newArr.length] = arr[i];

        }
        console.log(newArr);
    </script>
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